"We are in a historic era for the home run. The 2017 season saw the most homers ever, with 2016 and 2018 close behind, a shift that has transformed the way the game is played. In Swing Kings, Wall Street Journal national baseball writer Jared Diamond reveals that the secret behind this unprecedented shift isn't steroids or the stitching of the baseballs, it's the most elemental explanation of all: the swing. In this lively narrative romp, he tracks...